CN105502826B - A kind of high-efficient denitrification and dephosphorization sewage treatment process and its device - Google Patents

A kind of high-efficient denitrification and dephosphorization sewage treatment process and its device Download PDF

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Publication number
CN105502826B
CN105502826B CN201510996857.8A CN201510996857A CN105502826B CN 105502826 B CN105502826 B CN 105502826B CN 201510996857 A CN201510996857 A CN 201510996857A CN 105502826 B CN105502826 B CN 105502826B
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pond
dephosphorization
sewage
mud
film mud
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CN105502826A (en
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郑俊
张德伟
郑杰
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HUAQI ENVIRONMENT PROTECTION SCIENCE AND TECHNOLOGY Co Ltd
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HUAQI ENVIRONMENT PROTECTION SCIENCE AND TECHNOLOGY Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/105Phosphorus compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2806Anaerobic processes using solid supports for microorganisms
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2853Anaerobic digestion processes using anaerobic membrane bioreactors
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/34Biological treatment of water, waste water, or sewage characterised by the microorganisms used

Abstract

The invention discloses a kind of high-efficient denitrification and dephosphorization sewage treatment process and its devices, described device is sequentially connected in series by film mud coupling pond, chemical dephosphorization pond, aerobic nitrification biofilter, clear water reserviors, film mud couples and is equipped with the nitrification liquid return-flow system that reflux pump and reflux line form between pond and clear water reserviors, and film mud coupling pond includes flow-type film mud coupling pond or fixed film-mud coupling pond;Its high-efficient denitrification and dephosphorization sewage treatment process is by hydrolyzing, removing carbon, denitrogenation-dephosphorization, remove carbon, oil removal (SS)-nitrification, except the realization of three step of carbon.The present invention is able to achieve the purpose that simultaneous denitrification removes carbon and dephosphorization, has both the features such as at low cost, sludgd deposition is few, biological multiplication.

Description

A kind of high-efficient denitrification and dephosphorization sewage treatment process and its device
Technical field
The invention belongs to water-treatment technology fields, and in particular to a kind of high-efficient denitrification and dephosphorization sewage treatment process and its dress It sets.
Background technique
Biological aerated filter (BAF) is the New biological membrane method sewage treatment process that developed recently gets up, and is had efficient Removal of carbon and nitrogen efficiency, occupied area are small, operating cost is low, without secondary settling tank the features such as.But biological aerated filter process is to water inlet Concentration of suspension it is more demanding, need to carry out complicated pretreatment, such as the filtering of common coagulating sedimentation, film or other combinations Technique, this will undoubtedly increase the process flow and operational management difficulty of biological aerated filter, while can go in preprocessing process Except a large amount of organic matter (general COD removal rate is 40%~70%), this will reach newest country for control water outlet total nitrogen and arrange Put for the biological aerated filter process of standard, the removal of excessive organic matter by the carbon source during will lead to denitrification denitrogenation not Foot.Southern area problem is particularly acute, and southern raw water COD/TN is generally relatively low, if eliminating in preprocessing process largely has Machine object usually requires to add organic matter carbon source (glucose, methanol, sodium acetate etc.) to mend during subsequent denitrification denitrogenation Organic matter is filled, the problem of organic matter carbon source in raw water cannot be fully utilized and traditional pretreatment causes, not only Operating cost is increased, while also resulting in CO2 emissions and greatly increasing.
In addition, in denitrification and denitrogenation biological filter-aerobic nitrification biofilter group technology, although pretreatment can be with The water inlet concentration of suspension of denitrification and denitrogenation biological filter is reduced, but the suspended matter pre-processed in water outlet is still higher, causes Denitrification denitrogenation pond resistance constantly rises in operational process, need to continually be backwashed to keep denitrification and denitrogenation biological filter Stable operation.In addition, the organic concentration in the water inlet of subsequent aerobic biofilter can lead to the mass propagation of heterotroph, suppression Nitrobacteria has been made to the nitrification of ammonia nitrogen, while having increased backwash frequency, frequent backwash more easily leads to aerobe The recovery excessive cycle of biomass and bioactivity in filter tank, this undoubtedly reduces the treatment efficiency of structures and increases management Difficulty and operating cost.
In traditional biological aerated filter process, the removal effect of phosphorus is generally poor, needs to cooperate using preposition or postposition Chemical dephosphorization measure, in the engineering of preposition biological phosphate-eliminating, not only orthophosphates can consume a large amount of Dephosphorization reagent, while a large amount of The presence of fine particle, colloid or organic matter etc. can also consume a large amount of Dephosphorization reagent, this undoubtedly increases operating cost.
Summary of the invention
It is an object of the present invention to provide a kind of high-efficient denitrification and dephosphorization sewage treatment process and its device, the technique and its device at That function solves in traditional aeration biofilter technique that there are utilization of carbon source in raw water is insufficient, Dephosphorization reagent dosage is excessive, raw The object filter back washing period is frequently, structures treatment efficiency is lower, nitrification effect is bad, additional supplementing denitrifying carbon source etc. is asked Topic has the characteristics that purification sewage is high-efficient, processing effluent quality is good, and apparatus structure is simple, low in cost.
To achieve the above object, the present invention provides a kind of high-efficient denitrification and dephosphorization sewage-treatment plant, it is coupled by film mud Pond, chemical dephosphorization pond, aerobic nitrification biofilter, clear water reserviors are sequentially connected in series, and are equipped with back between film mud coupling pond and clear water reserviors The nitrification liquid return-flow system of stream pump and reflux line composition, and then successively constitute biological reinforced hydrolysis, except carbon, denitrogenation-materialization The dephosphorization of reinforcing removes the biological reinforced nitrification of carbon, oil removal (SS)-, except the high-efficient denitrification and dephosphorization sewage treatment of three step of carbon Device.
Film mud coupling pond includes flow-type film mud coupling pond or fixed film-mud coupling pond, can couple anoxic pond for film mud Or film mud couples anaerobic pond.
Chemical dephosphorization pond includes Dephosphorization reagent dosing system, agitating device, chemical dephosphorization pond ontology, sludge pipe, and chemistry removes Phosphorus pond ontology is high-efficiency coagulative precipitation tank or magnetic-coagulation sedimentation basin.
Film mud coupling pond is that flow-type film mud couples pond, and peripheral effluent is equipped with the mesh isolation of separation bio-carrier Device includes agitating device, water distribution system, suspension biofilm carrier, biomembrane and suspension sludge in pond.
Film mud coupling pond is that fixed film-mud couples pond, and it includes water distribution system in pond that fixed film-mud, which couples, solid Fixed pattern biofilm carrier, biomembrane and suspension sludge.
The agitating device is underwater stirrer or underwater plug flow device, and quantity is arranged and is at least 1 group.
The suspension biofilm carrier filling rate is 5%~70%,
The present invention provides a kind of high-efficient denitrification and dephosphorization sewage treatment process, and steps are as follows:
(1) biological reinforced hydrolysis, denitrogenation, except carbon react: sewage to be processed is mixed with the nitrification liquid that clear water reserviors flow back Afterwards from the water distribution system of bottom flow into film mud couple pond, film mud couple pond in biofilm carrier, suspension sludge surface and Growth inside hydrolysis acidifying microbes and obligate denitrifying microorganism.Film mud couples the mixed liquid recycle ratio between pond and clear water reserviors It is 10%~400%, waste water reacts 1h~12h in film mud coupling pond.When film mud coupling pond is that flow-type film mud couples pond, Its peripheral effluent is equipped with the mesh isolating device of separation bio-carrier, and the agitating device in film mud coupling pond makes suspended biological membrane carrier In fluidized state, accelerate the mass transfer rate of pollutant.The organic matter that the ectoplasm of hydrolysis acidification microorganism can carry raw water It is adsorbed with suspended matter, intracellular ectoenzyme is entering endocellular metabolism after being hydrolyzed into small molecule, and incomplete metabolism is hanged Floating object (SS) can become the organic matter that small molecule is easy to degrade, and obligate denitrifying microorganism then utilizes the organic matter in raw sewage With the dissolved organic matter after conversion as carbon source, the nitrate nitrogen in the reflux nitrification liquid of clear water reserviors is reduced to nitrogen Gas, to realize denitrogenation and remove the purpose of most of organic matter.
(2) materialization is strengthened dephosphorization, except carbon, oil removal react: water outlet is removed into chemistry after film mud coupling pond purification Phosphorus pond.By adding chemical dephosphorization medicament, total phosphorus, organic matter and suspended matter in sewage are removed, chemical sludge is generated and then passes through Sludge pipe is periodically discharged, and is less than 70mg/L by the concentration of suspension in the water outlet of mud-water separation, after mud-water separation purifies Water inlet of the water outlet as aerobic nitrification biofilter.
(3) biological reinforced nitrification, react except carbon: through treated in chemical dephosphorization pond, water outlet enters aerobic nitrification biological filter Pond, dissolved oxygen are 3.0~8.0mg/L, and hydraulic detention time is 0.5h~12h.Apposition growth is obligate on biologic packing material layer Ammonium oxidation is nitrate nitrogen by aerobic nitrification bacterium, and aerobic heterotroph of the apposition growth on biologic packing material layer will be a small amount of remaining Organic matter removal, through treated for aerobic nitrification biofilter, sewage flows into clear water reserviors, and the part water outlet of clear water reserviors is as nitrification Liquid reflux water, part water outlet are discharged as standard discharge.
The present invention efficiently solves, conventional aeration biofilter pretreatment complexity, recoil insufficient to raw water utilization of carbon source Wash frequently and the problem of, while stain disease can be made to reach simultaneous denitrification except carbon and dephosphorization purpose, have both at low cost, sludgd deposition Less, the features such as biology multiplication, there is great application value.
Detailed description of the invention
Fig. 1 is one of high-efficient denitrification and dephosphorization sewage-treatment plant structural schematic diagram of the present invention.
Fig. 2 is high-efficient denitrification and dephosphorization sewage-treatment plant second structural representation of the present invention.
Fig. 3 is high-efficient denitrification and dephosphorization sewage treatment process figure of the present invention.
Specific embodiment
In Fig. 1: 1, water inlet line, 2, elevator pump, 3, flow-type film mud coupling pond, 4, biofilm packing and Sludge Bed mixing Area, 5, water distribution system, 6, suspension sludge, 7, floating stuffing, 8, agitating device, 9, mesh isolating device, 10, outlet canal, 11, Connecting pipe, 12, chemical dephosphorization pond, 13, dephosphorization medicine system, 14, blender, 15, outlet canal, 16, sludge pipe, 17, connection Pipeline, 18, aerobic nitrification biofilter, 19, highly effective air diffuser, 20, water distribution system, 21, nitrification biologic packing material layer, 22, Clear water zone, 23, outlet canal, 24, aerator, 25, steam line, 26, outlet conduit, 27, water distributing area, 28, nitrification liquid reflux Pump, 29, nitrification liquid reflux line, 30, clear water reserviors, 31, discharge tube.
In Fig. 2: 1', water inlet line, 2', elevator pump, 3', fixed film-mud couple pond, 4', fixed filler and sludge Bed mixed zone, 5', water distribution system, 6', suspended sludge bed, 7', cilium shape biologic packing material or suspension type bioelastic filler, 8', Outlet canal, 9', connecting pipe, 10', chemical dephosphorization pond, 11', medicine system, 12', blender, 13', outlet canal, 14', spoil disposal Pipe, 15', connecting pipe, 16', aerobic aeration biofilter, 17', highly effective air diffuser, 18', water distribution system, 19', nitrification Biologic packing material layer, 20', clear water zone, 21', outlet canal, 22', aerator, 23', steam line, 24', outlet conduit, 25', Water distributing area, 26', nitrification liquid reflux pump, 27', nitrification liquid reflux line, 28', clear water reserviors, 29', discharge tube.
Specific embodiment
Embodiment 1
Certain sewage treatment plants, 10,000 m for the treatment of capacity3/ d, inlet COD concentration 240mg/L, TP 12mg/L, NH3- N (ammonia Nitrogen) concentration be 40mg/L, TN (total nitrogen) 60mg/L, suspended matter (SS) 135mg/L.Sewage successively passes through the coupling of flow-type film mud Pond, chemical dephosphorization pond, aerobic nitrification biofilter, clear water reserviors processing.Flow-type film mud couples the tank waterpower residence time as 1h, stirs 4 groups of device are mixed, carrier filling rate is 50%, mixed liquid recycle ratio 100%;Aerobic nitrification biofilter dissolved oxygen is 5.0mg/ L, hydraulic detention time 1h.Final outflow water meets in " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) Level-one emission standard A.
Embodiment 2
Certain chemical wastewater treatment factory, 0.3 ten thousand m for the treatment of capacity3/ d, inlet COD concentration 2240mg/L, TP 42mg/L, NH3-N (ammonia nitrogen) concentration is 90mg/L, TN (total nitrogen) 600mg/L, suspended matter (SS) 635mg/L.Waste water successively pass through film mud coupling pond, Chemical dephosphorization pond, aerobic nitrification biofilter, clear water reserviors processing.The film mud coupling tank waterpower residence time is 10h, agitating device 5 Group, carrier filling rate are 60%, mixed liquid recycle ratio 300%;Aerobic nitrification biofilter dissolved oxygen is 6.0mg/L, waterpower Residence time is 12h.Final outflow water COD concentration is 150mg/L, TP 0.02mg/L, NH3- N (ammonia nitrogen) concentration is 2mg/L, TN (total nitrogen) 65mg/L, suspended matter (SS) 8mg/L.
Embodiment 3
Certain sewage treatment plants, 10,000 m for the treatment of capacity3/ d, inlet COD concentration 240mg/L, TP 12mg/L, NH3- N (ammonia Nitrogen) concentration be 40mg/L, TN (total nitrogen) 60mg/L, suspended matter (SS) 135mg/L.Sewage is successively by fixed film-mud coupling Pond, chemical dephosphorization pond, aerobic nitrification biofilter, clear water reserviors processing.Fixed film-mud coupling tank waterpower residence time is 2h, Mixed liquid recycle ratio is 150%;Aerobic nitrification biofilter dissolved oxygen is 4.0mg/L, hydraulic detention time 3h.Final outflow water Meet level-one emission standard A in " urban wastewater treatment firm pollutant emission standard " (GB18918-2002).
Embodiment 4
Certain chemical wastewater treatment factory, 0.3 ten thousand m for the treatment of capacity3/ d, inlet COD concentration 2240mg/L, TP 42mg/L, NH3-N (ammonia nitrogen) concentration is 90mg/L, TN (total nitrogen) 600mg/L, suspended matter (SS) 635mg/L.Waste water successively passes through fixed film-mud Couple pond, chemical dephosphorization pond, aerobic nitrification biofilter, clear water reserviors processing.Fixed film-mud coupling tank waterpower the residence time is 10h, mixed liquid recycle ratio 280%;Aerobic nitrification biofilter dissolved oxygen is 6.0mg/L, hydraulic detention time 12h.Most Whole effluent COD concentration is 130mg/L, TP 0.03mg/L, NH3- N (ammonia nitrogen) concentration is 3mg/L, TN (total nitrogen) 63mg/L, is suspended Object (SS) 10mg/L.
The present invention efficiently solves conventional aeration biofilter insufficient to raw water utilization of carbon source, pretreatment complexity and recoil Frequent problem is washed, and is able to achieve the purpose that simultaneous denitrification removes carbon and dephosphorization, has both that at low cost, sludgd deposition is few, biological multiplication The features such as.

Claims (6)

1. a kind of high-efficient denitrification and dephosphorization sewage-treatment plant, described device is to couple pond, chemical dephosphorization pond, aerobic nitrification by film mud Biofilter, clear water reserviors are sequentially connected in series, it is characterized in that being equipped with reflux pump and reflux line between film mud coupling pond and clear water reserviors The nitrification liquid return-flow system of composition, it is that film mud couples anoxic pond or film mud couples anaerobic pond that film mud, which couples pond,;The film mud coupling Pond is that flow-type film mud couples pond, and it includes stirring in pond that peripheral effluent, which is equipped with the mesh isolating device of separation bio-carrier, Device, water distribution system, suspension biofilm carrier, biomembrane and suspension sludge;The chemical dephosphorization pond includes Dephosphorization reagent Dosing system, agitating device, chemical dephosphorization pond ontology, sludge pipe, chemical dephosphorization pond ontology are that high-efficiency coagulative precipitation tank or magnetic are mixed Solidifying sedimentation basin.
2. high-efficient denitrification and dephosphorization sewage-treatment plant according to claim 1, it is characterized in that the film mud couples Chi Weigu Fixed pattern film mud couples pond, and fixed film mud coupling includes water distribution system, fixed type biological membrane carrier, biomembrane and suspension in pond Sludge.
3. high-efficient denitrification and dephosphorization sewage-treatment plant according to claim 1, it is characterized in that the agitating device is underwater Blender or underwater plug flow device, and quantity is set and is at least 1 group.
4. high-efficient denitrification and dephosphorization sewage-treatment plant according to claim 1, it is characterized in that the suspension biomembrane carries Body filling rate is 5%~70%.
5. the sewage treatment process of high-efficient denitrification and dephosphorization sewage-treatment plant according to claim 1, processing step is such as Under:
(1) hydrolysis, denitrogenation, react except carbon: sewage to be processed mixed with the nitrification liquid that clear water reserviors flow back after from the water distribution of bottom System flow into film mud couple pond, film mud couple pond in biofilm carrier, suspension sludge surface and growth inside hydrolysis Acidifying microbes and obligate denitrifying microorganism;It is 10%~400% that film mud, which couples the mixed liquid recycle ratio between pond and clear water reserviors, Waste water reacts 1h~12h in film mud coupling pond;
(2) dephosphorization, except carbon, oil removal react: through film mud coupling pond purification after water outlet enter chemical dephosphorization pond;By adding Dephosphorization reagent PB1 gene, polyacrylamide PAM are learned, total phosphorus, organic matter and suspended matter in sewage, generationization are removed Sludge then passes through sludge pipe and is periodically discharged, and is less than 70mg/L by the concentration of suspension in the water outlet of mud-water separation, by mud Water separates water inlet of the purified water outlet as aerobic nitrification biofilter;
(3) nitrify, except carbon reacts: through treated in chemical dephosphorization pond, water outlet enters aerobic nitrification biofilter, dissolved oxygen 3.0 ~8.0mg/L, hydraulic detention time are 0.5h~12h;Through treated for aerobic nitrification biofilter, sewage flows into clear water reserviors, clearly The part water outlet in pond is discharged as nitrification liquid reflux water, part water outlet as standard discharge.
6. according to the sewage treatment process of high-efficient denitrification and dephosphorization sewage-treatment plant described in right 5, it is characterized in that film mud couples The organic matter and suspended matter that the ectoplasm of hydrolysis acidification microorganism in pond can carry raw water adsorb, and intracellular ectoenzyme will It is entering endocellular metabolism after being hydrolyzed into small molecule, and the suspended matter (SS) of incomplete metabolism can become small molecule and be easy to drop The organic matter of solution, obligate denitrifying microorganism is then using the organic matter in raw sewage and the dissolved organic matter after conversion as carbon Nitrate nitrogen in the reflux nitrification liquid of clear water reserviors is reduced to nitrogen by source, to realize that denitrogenation and removal are most of The purpose of organic matter.
CN201510996857.8A 2015-12-24 2015-12-24 A kind of high-efficient denitrification and dephosphorization sewage treatment process and its device Active CN105502826B (en)

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